//跨浏览器事件兼容
var eventUtil = {
    //添加句柄
    addHandler:function(element,type,handler){
        if(element.addEventListener){
            element.addEventListener(type, handler, false);
        }else if(element.attachEvent){
            element.attachEvent("on"+type, handler)
        }else{
            element["on"+type] = handler;
        }
    },
    //删除句柄
    removeHandler:function(element,type,handler){
        if(element.removeEventListener){
            element.removeEventListener(type, handler, false);
        }else if(element.detachEvent){
            element.detachEvent("on"+type, handler)
        }else{
            element["on"+type] = null;
        }
    },
    //获取事件对象
    getEvent:function(event){
        return event?event:window.event;
    },
    //获取事件源
    getType:function(event){
        return event.target || event.srcElement;
    },
    //阻止默认行为
    preventDefault:function(event){
        if(event.preventDefault){
            event.preventDefault();
        }else{
            event.returnValue = false;
        }
    },
    //阻止冒泡
    stopPropagation:function(event){
        if(event.stopPropagation){
            event.stopPropagation();
        }else{
            event.cancelBubble = true;
        }
    },
}
